MICHAEL & CATHERINE DIVORCE RUMOURS EXPLODE again

SUDDEN HOUSE SALE SPARKS TALK OF A SHOCK SPLIT

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Catherine ZetaJones and Michael Douglas have listed their New York estate for sale at $18 million - and it's sparked rumours about the couple's future.

Catherine, 54, and Michael, 79, have been married 23 years and are considered to have one of Hollywood's happiest long-term relationships.

However, New Idea hears the couple's decision to list their home has ignited speculation about the state of their marriage.

"This is not good," says an insider. "That's their precious family home."